Term
| if the beat originates in the Atria or AV node then the QRS is usually: |
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Definition
| narrow, if it originates in the ventricals then it is wide and bizarre |
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Term
| 4 general groups of arhythmias |
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Definition
1. irregular rhythms
2. escape/premature beats
3. rapid ectopic rhythms
4. atrioventricular heart blocks |
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Term
| p waves and p-r intervals are identical but rate varies: |
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Definition
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Term
| p waves of varying shape and different p-r intervals |
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Definition
| wandering atrial pacemaker OR if rate >100 then its multifocal atrial tachycardia |
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Term
| no p waves; irregular/wavy baseline and QRS is irregularly spaced: |
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Definition
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Term
| usual pacemaker fails so a slower pacemaker fires at its inherent rate: |
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Definition
| escape beat: could be atrial, junctional or ventricular |
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Term
| escape beat: different appearing and late p waves |
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Definition
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Term
| escape beat: no p waves normal narrow QRS |
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Definition
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Term
| escape beat: no p wave and wide bizarre QRS |
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Definition
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Term
| ectopic pacemaker fires early before the next scheduled beat: |
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Definition
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Term
| pwave may run into previous T wave; caused by adrenergics |
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Definition
| premature atrial contraction |
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Term
| early beat with no p wave and normal narrow QRS: |
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Definition
| premature junctional beat |
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Term
| early beath with no p wave and wide QRS; caused by (3): |
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Definition
premature ventricular contraction
caused by: hypoxia, hypokalemia, mitral valve prolapse |
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Term
| accelerated rate (150) and narrow QRS: |
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Definition
| paroxysmal supraventricular tachycardia |
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Term
| accelerated rate and wide QRS: |
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Definition
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Term
| large eratic and wavy baseline: |
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Definition
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Term
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Definition
| 1st degree AV heart block |
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Term
| PR interval gets progressively longer until a QRS is dropped: |
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Definition
| 2nd degree AV heart block = Wenkebach |
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Term
| PR intervals are constant and QRS is dropped intermittently: |
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Definition
| Mobitz; 2nd degree AV heart block |
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Term
| PR interval is constantly changing and QRS is wide: |
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Definition
| 3rd degree AV block (most serious) |
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Term
| QRS interval should be less than: |
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Definition
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Term
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Definition
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Term
| QRS >.12 and RR in V1-V2 = |
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Definition
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Term
| QRS >.12 and RR in V5-V6 = |
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Definition
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Term
| VERY IMPORTANT: The EKG is often unreliable in detecting ________ during LBBB. |
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Definition
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Term
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Definition
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Term
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Definition
| Junctional Rhythm: no p waves, relatively narrow QRS |
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Term
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Definition
First Degree Block
PR interval is greater than .2 seconds (one large box). Note that there is a P wave before each QRS and a QRS after each P wave |
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Term
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Definition
paroxysmal supraventricular tachycardia
Regular narrow QRS. Often it's hard to determine whether it's atrial or junctional as it is going too fast to see P waves. Clinically it doesn't matter since they are treated the same |
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Term
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Definition
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Term
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Definition
LBBB
Left Bundle Branch Block
The wide QRS in V5 and V6; the RR' is present but not as distinct as in right bundle branch block. With left bundle branch block the signs of infarction are unreliable |
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Term
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Definition
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Term
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Definition
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Term
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Definition
Third Degree Block
The atrial rate is independent of the ventricular rate so the P waves are independent of the QRS's. The P waves are regular and can be marched out with calipers. The same can be done with the QRS complexes |
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Term
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Definition
Second Degree Block Type 2
PR intervals are the same, but every other beat is dropped
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Term
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Definition
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Term
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Definition
Second Degree Block Type 1 (Wenckebach)
The PR gets progressively longer until a beat is dropped |
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Term
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Definition
Wandering Atrial Pacemaker
(It's called Multi focal Atrial Tachycardia if the rate is >100). Strict definition is 3 different P wave morphologies and 3 different PR intervals |
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Term
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Definition
PAC
Premature Atrial Contraction
The third beat is premature. It has a P wave of different morphology than the sinus beats. This defines it as a premature atrial contraction |
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Term
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Definition
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Term
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Definition
sinus arrhythmia
Irregular, but note P wave morphology and PR intervals are identical, this identiies it as a sinus rhythm. |
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Term
| atrial rate >100, assoc w COPD and sometimes Digoxin toxicity |
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Definition
| multifocal atrial tachycardia |
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Term
| what are the rates assoc with ea rhythm? paroxysmal tachy, flutter, fibrilation |
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Definition
paroxysmal tachy:150-250
flutter:250-350
fibrilation:350-450 |
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Term
o Very rapid ventricular rhythm caused by hypokalemia or congenital d/o
o 250-350 bpm
o Looks like twisted ribbon, get progressively larger than smaller
o Usually brief self-terminating bursts, but if unresolved can lead to deadly arrhythmia |
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Definition
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Term
| o AKA Barlow’s syndrome, benign condition, more common in women |
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Definition
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Term
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Definition
| PAC w aberrant ventricular conduction |
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Term
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Definition
| irritable atrial focus repeatedly couples a PAC to the end of each normal cycle |
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Term
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Definition
| 2 normal cycles followed by a PAC |
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Term
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Definition
| an extra or accessory conduction pathway between the atria and ventricles in the heart - assoc w Wolfe-Parkinson-White syndrome |
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Term
| Wolfe-Parkinson-White Syndrome: |
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Definition
| premature ventricular contraction caused by short circuiting from the bundle of Kent |
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Term
| conduction tract in left atrium. Originates in the SA node and distributes depolarization. |
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Definition
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